Infrared touch module and display device

Abstract

The utility model relates to the field of infrared touch control, particularly provides an infrared touch control module, and aims to solve the problem of poor touch control sensitivity of an existing infrared touch control module. In order to achieve the purpose, the infrared touch module comprises a frame, a transmitting assembly and a receiving assembly, infrared light emitted by the transmitting assembly is received by the receiving assembly, the transmitting assembly comprises an infrared light-emitting unit and a first optical module, a first light beam emitted by the infrared light-emitting unit emits a second light beam through the first optical module, and the second light beam is emitted by the second optical module. The first optical module is configured to enable the width of the second light beam in the direction perpendicular to the emergent direction to be smaller than the width of the first light beam in the direction perpendicular to the emergent direction. The second light beam is formed by converging the first light beam through the first optical module, and the intensity of the second light beam is approximately equivalent to that of the first light beam, so that the size a of the infrared light channel can be reduced on the premise of not reducing the intensity of the second light beam (namely on the premise of ensuring the touch precision), and the touch sensitivity of the infrared touch module is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of infrared touch control, and specifically provides an infrared touch control module and a display device. Background Art

[0002] In display devices, touch devices are important means of user interaction. Users can operate the display device by touching the display screen. In current mainstream display products, capacitive touch or infrared touch solutions are generally used. However, for large-size display devices (for example, above 55 inches), infrared touch is the mainstream touch device implementation solution due to its cost advantage, but the touch sensitivity still needs to be improved during use. Summary of the invention

[0003] The present disclosure aims to solve the problems of the prior art and provides an infrared touch module and a display device.

[0004] In a first aspect, the present disclosure provides an infrared touch module, comprising: a frame, comprising relatively arranged frame strips; a transmitting component arranged in one of the relatively arranged frame strips and a receiving component arranged in another relatively arranged frame strip, wherein infrared light emitted by the transmitting component is received by the receiving component, wherein the transmitting component comprises an infrared light-emitting unit and a first optical module, wherein a first light beam emitted by the infrared light-emitting unit emits a second light beam via the first optical module, wherein the first optical module is configured so that a width of the second light beam perpendicular to the emitting direction is smaller than a width of the first light beam perpendicular to the emitting direction.

[0005] In some exemplary embodiments, the first optical module includes a first convex lens and a first concave lens sequentially arranged along a light emitting direction of the first light beam, wherein a focus of the first convex lens coincides with a focus of the first concave lens.

[0006] In some exemplary embodiments, the first convex lens is disposed symmetrically with respect to the optical axis of the first convex lens; and the first concave lens is disposed symmetrically with respect to the optical axis of the first convex lens.

[0007] In some exemplary embodiments, the first convex lens and the first concave lens are both disposed away from the optical axis of the first convex lens, and the first concave lens is closer to the optical axis of the first convex lens than the first convex lens.

[0008] In some exemplary embodiments, the first optical module includes a first convex lens and a second convex lens sequentially arranged along a light emitting direction of the first light beam, wherein a focus of the first convex lens coincides with a focus of the second convex lens.

[0009] In some exemplary embodiments, the first convex lens is disposed axially symmetrically with respect to the optical axis of the first convex lens; and the second convex lens is disposed axially symmetrically with respect to the optical axis of the first convex lens.

[0010] In some exemplary embodiments, the first convex lens and the second convex lens are both disposed away from the optical axis of the first convex lens, and the second convex lens is closer to the optical axis of the first convex lens than the first convex lens.

[0011] In some exemplary embodiments, along the thickness direction of the infrared touch module, the length of the first concave lens is smaller than the length of the first convex lens.

[0012] In some exemplary embodiments, along the thickness direction of the infrared touch module, the length of the second convex lens is smaller than the length of the first convex lens.

[0013] In some exemplary embodiments, the transmitting assembly further includes a first circuit board, the first circuit board is fixed in the frame bar, and the infrared light emitting unit and the first optical module are both fixed to the first circuit board.

[0014] In some exemplary embodiments, a plurality of first convex lenses are provided, and the first convex lenses correspond one-to-one to the infrared light-emitting units; or, the first convex lenses extend along the length direction of the frame strip, and the projection of the first convex lenses along the emitting direction of the first light beam covers the projections of the plurality of infrared light-emitting units along the emitting direction of the first light beam.

[0015] In some exemplary embodiments, the receiving component includes a receiving unit and a second optical module, the second light beam emits a third light beam through the second optical module, and the receiving unit receives the third light beam.

[0016] In some exemplary embodiments, the second optical module is configured such that a width of the third light beam perpendicular to the incident direction is greater than a width of the second light beam perpendicular to the incident direction.

[0017] In some exemplary embodiments, the second optical module includes a second concave lens and a third convex lens sequentially disposed along the incident direction of the second light beam, wherein the focus of the second concave lens coincides with the focus of the third convex lens.

[0018] In some exemplary embodiments, the second concave lens is disposed axially symmetrically with respect to the optical axis of the third convex lens; and the third convex lens is disposed axially symmetrically with respect to the optical axis of the third convex lens.

[0019] In some exemplary embodiments, the second concave lens and the third convex lens are both disposed away from the optical axis of the third convex lens, and the second concave lens is closer to the optical axis of the third convex lens than the third convex lens.

[0020] In some exemplary embodiments, the second optical module includes a fourth convex lens and a third convex lens sequentially disposed along the incident direction of the second light beam, wherein the focal points of the third convex lens and the fourth convex lens coincide with each other.

[0021] In some exemplary embodiments, the third convex lens is disposed symmetrically with respect to the optical axis of the third convex lens; and the fourth convex lens is disposed symmetrically with respect to the optical axis of the third convex lens.

[0022] In some exemplary embodiments, the third convex lens and the fourth convex lens are both disposed away from the optical axis of the third convex lens, and the fourth convex lens is closer to the optical axis of the third convex lens than the third convex lens.

[0023] In a second aspect, the present disclosure provides a display device, comprising: an infrared touch module as described above, wherein relatively arranged frame bars comprise relatively arranged first frame bars and second frame bars and relatively arranged third frame bars and fourth frame bars, and wherein the first frame bars and the second frame bars are respectively provided with a pair of transmitting components and receiving components, and the third frame bars and the fourth frame bars are respectively provided with another pair of transmitting components and receiving components; a display panel, surrounded by relatively arranged first frame bars and second frame bars and relatively arranged third frame bars and fourth frame bars.

[0024] In some exemplary embodiments, along a direction perpendicular to the display panel, the light emitting component of the first optical module overlaps the display side of the display panel.

[0025] In some exemplary embodiments, along a direction perpendicular to the display panel, a thickness of the light emitting component of the first optical module is greater than or equal to a flatness of a display side of the display panel.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The infrared touch module provided by the present disclosure includes a frame, a transmitting component and a receiving component, wherein the frame includes relatively arranged frame bars; a transmitting component is arranged in one of the relatively arranged frame bars and a receiving component is arranged in the other, wherein the infrared light emitted by the transmitting component is received by the receiving component, wherein the transmitting component includes an infrared light-emitting unit and a first optical module, wherein the first light beam emitted by the infrared light-emitting unit emits a second light beam through the first optical module, and the first optical module is configured so that the width of the second light beam perpendicular to the emission direction is smaller than the width of the first light beam perpendicular to the emission direction. Since the second light beam is formed by the first light beam converging through the first optical module, the intensity of the second light beam is roughly equivalent to the intensity of the first light beam, therefore, the size a of the infrared light channel can be reduced without reducing the intensity of the second light beam (i.e., on the premise of ensuring the touch accuracy), thereby improving the touch sensitivity of the infrared touch module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a cross-sectional view of a display device provided by at least one embodiment of the present disclosure;

[0030] Figure 2 is a plan view of a display device provided by at least one embodiment of the present disclosure;

[0031] Figure 3A is another cross-sectional view of a display device provided by at least one embodiment of the present disclosure;

[0032] Figure 3B is another cross-sectional view of a display device provided by at least one embodiment of the present disclosure;

[0033] Figure 3C is another cross-sectional view of a display device provided by at least one embodiment of the present disclosure;

[0034] Figure 4 An exploded schematic diagram of a transmitting assembly or a receiving assembly provided by at least one embodiment of the present disclosure;

[0035] Figure 5A is a schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure;

[0036] Figure 5B is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure;

[0037] Figure 5C is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure;

[0038] Figure 5D is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure;

[0039] Fig. 6A is a schematic diagram of a receiving component provided by at least one embodiment of the present disclosure;

[0040] Figure 6B is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure;

[0041] Figure 6C is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure;

[0042] Fig.6D This is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure.

[0043] Description of reference numerals:

[0044] 10. Infrared touch module; 1. Frame; 11. First frame bar; 12. Second frame bar; 13. Third frame bar; 14. Fourth frame bar; 2. Transmitter assembly; 21. Infrared light-emitting unit; 22. First optical module; 221. First convex lens; 222. First concave lens; 223. Second convex lens; 23. First circuit board; 24. First light beam; 25. Second light beam; 3. Receiving assembly; 31. Receiving unit; 32. Second optical module; 321. Third convex lens; 322. Second concave lens; 323. Fourth convex lens; 33. Second circuit board; 34. Third light beam; 20. Display panel; 4. Backlight assembly; 5. Display assembly; 51. Tempered film; 30. Back cover. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present disclosure and are not intended to limit the protection scope of the present disclosure.

[0046] It should be noted that in the description of the present disclosure, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In addition, it should be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0048] Figure 1 is a cross-sectional view of a display device provided by at least one embodiment of the present disclosure.

[0049] like Figure 1As shown, the infrared touch display device includes an infrared touch module 10' and a display panel 20'. The infrared touch module 10' includes a frame 1' and a transmitting component 2', a receiving component 3' and a filter strip 4' installed in the frame 1', wherein the transmitting component 2 and the receiving component 3 are respectively installed in two opposite frame strips of the frame 1 (the transmitting component 2' and the receiving component 3' are respectively installed in two opposite frame strips arranged along the first direction and the second direction), and the filter strip 4' is installed on the inner surface of the frame 1'. The display panel 20' is located on the inner side of the frame 1', and the filter strip 4' is located on the edge of the display side of the display panel 20'.

[0050] The transmitting component 2′ can emit parallel infrared light, which passes through the filter bar and then is emitted to the receiving component 3′ and is received by the receiving component 3′. When a finger touches the display panel 20′, the finger can block the infrared light, and the receiving component 3′ corresponding to the infrared light blocked by the finger cannot receive the infrared light, thereby obtaining the position of the finger on the display panel 20′. For example, after the infrared light emitted along the first direction is blocked by the finger, the receiving component 3′ that does not receive the infrared light in the first direction outputs a signal to indicate the coordinates of the finger in the second direction; after the infrared light emitted along the second direction is blocked by the finger, the receiving component 3′ that does not receive the infrared light in the second direction outputs a signal to indicate the coordinates of the finger in the first direction, thereby obtaining the coordinates of the finger on the display panel 20′, thereby realizing touch control.

[0051] The frame 1' has a light outlet channel, and the size of the light outlet channel determines the path size a of the infrared light.

[0052] In some examples, along the thickness direction of the display device, a portion of the frame 1' overlaps the display side of the display panel 20', so that there is a certain distance b between the infrared light path and the display panel 20'. The smaller the distance b between the infrared light path and the display panel 20', the better the user experience of the infrared touch module 10'.

[0053] The smaller the infrared light path size a is, the better the user experience of the infrared touch module 10' is. However, at the same time, the smaller the infrared light path size a is, the weaker the infrared light intensity emitted from the infrared light path by the transmitting component 2' is, and the intensity of the infrared light received by the receiving component 3' is also weaker, resulting in insufficient sensitivity of infrared light emission and reception, which will also affect the user experience of the infrared touch module 10'.

[0054] In view of this, an infrared touch module is provided in an embodiment of the present disclosure, comprising: a frame, comprising relatively arranged frame strips; a transmitting component arranged in one of the relatively arranged frame strips and a receiving component arranged in another relatively arranged frame strip, wherein the infrared light emitted by the transmitting component is received by the receiving component, wherein the transmitting component comprises an infrared light-emitting unit and a first optical module, wherein a first light beam emitted by the infrared light-emitting unit emits a second light beam via the first optical module, wherein the first optical module is configured so that a width of the second light beam perpendicular to the emitting direction is smaller than a width of the first light beam perpendicular to the emitting direction.

[0055] The display panels and preparation methods of some embodiments of the present disclosure are described below through several specific embodiments.

[0056] Figure 2 is a plan view of a display device provided by at least one embodiment of the present disclosure; Figure 3A is another cross-sectional view of a display device provided by at least one embodiment of the present disclosure.

[0057] like Figure 3A As shown, at least one embodiment of the present disclosure discloses a display device, including an infrared touch module 10 and a display panel 20. In some examples, the infrared touch module 10 can be externally mounted on the display side of the display panel 20. In some other examples, the infrared touch module 10 and the display panel 20 are a combined structure, the infrared touch module 10 is located on the display side of the display panel 20, and a rear shell 30 is set on the non-display side of the display panel 20, and the rear shell 30 is connected to the infrared touch module 10 to fix the display panel 20.

[0058] The infrared touch module 10 includes a frame 1, a transmitting component 2 and a receiving component 3. The transmitting component 2 and the receiving component 3 are both arranged in the frame 1. The transmitting component 2 is used to transmit infrared light, and the receiving component 3 is used to receive the infrared light emitted by the transmitting component 2. The display panel 20 is installed on the inner side of the frame 1 so that the frame 1 surrounds the display panel 20.

[0059] Combination Figure 2As shown, the frame 1 includes two sets of relatively arranged frame bars, namely, the relatively arranged first frame bar 11 and the second frame bar 12 and the relatively arranged third frame bar 13 and the fourth frame bar 14, which surround the display panel 20. The first frame bar 11 and the second frame bar 12 are respectively provided with a pair of transmitting components 2 and receiving components 3, and the third frame bar 13 and the fourth frame bar 14 are respectively provided with a pair of transmitting components 2 and receiving components 3. For example, the transmitting component 2 is provided in the first frame bar 11 and the third frame bar 13, and the receiving component 3 is provided in the second frame bar 12 and the fourth frame bar 14. The transmitting component 2 provided in the first frame bar 11 transmits infrared light along the first direction, which is received by the receiving component 3 provided in the second frame bar 12; the transmitting component 2 provided in the third frame bar 13 transmits infrared light along the second direction, which is received by the collective receiving component 3 provided in the fourth frame bar 14. When a finger touches the display panel 20, the finger will block the infrared light emitted along the first direction and the second direction, so that the receiving component 3 located in the second frame bar 12 and the fourth frame bar 14 cannot receive the infrared light blocked by the finger. The coordinates of the finger on the display panel 20 are obtained by acquiring the position information of the receiving component 3 that has not received the infrared light, thereby achieving touch control.

[0060] Figure 4 An exploded schematic diagram of a transmitting component or a receiving component provided in at least one embodiment of the present disclosure.

[0061] like Figure 3A and Figure 4 As shown, the transmitting component 2 includes an infrared light-emitting unit 21 and a first optical module 22. The infrared light-emitting unit 21 is arranged at intervals along the length direction of the frame bar and is configured to emit a first beam 24 of parallel infrared light. The first beam 24 emitted by the infrared light-emitting unit 21 emits a second beam 25 through the first optical module 22, and the second beam 25 is emitted to the receiving component 3. Among them, the first optical module 22 is configured to make the width of the second beam 25 perpendicular to the emission direction smaller than the width of the first beam 24 perpendicular to the emission direction, and the width of the second beam 25 perpendicular to the emission direction is the size a of the infrared light channel. Since the second beam 25 is formed by the first beam 24 through the first optical module 22, the intensity of the second beam 25 is roughly equivalent to the intensity of the first beam 24. Therefore, the size a of the infrared light channel can be reduced without reducing the intensity of the second beam 25 (that is, on the premise of ensuring the touch accuracy), thereby improving the touch sensitivity of the infrared touch module 10.

[0062] For example, Figure 4As shown, the transmitting assembly 2 further includes a first circuit board 23, the first circuit board 23 is fixed in the frame bar, and the infrared light emitting unit 21 and the first optical module 22 are both fixed to the first circuit board 23. In this way, the infrared light emitting unit 21 and the first optical module 22 can be pre-installed on the first circuit board 23 in advance, thereby reducing the installation tolerance of the transmitting assembly 2 and improving the emission accuracy and intensity of the infrared light.

[0063] like Figure 3A and Figure 4 As shown, the receiving assembly 3 includes a receiving unit 31 and a second optical module 32, and the receiving units 31 are arranged at intervals along the length direction of the frame strip. The second light beam 25 emitted from the first optical assembly is emitted to the second optical module 32, and the third light beam 34 is emitted after passing through the second optical module 32, and the third light beam 34 is emitted to the receiving assembly 3.

[0064] For example, the receiving component 3 further includes a second circuit board 33, the second circuit board 33 is fixed in the frame bar, and the receiving unit 31 and the second optical module 32 are both fixed to the second circuit board 33. In this way, the receiving unit 31 and the second optical module 32 can be pre-installed on the second circuit board 33 in advance, thereby reducing the installation tolerance of the receiving component 3 and improving the emission accuracy and intensity of the infrared light.

[0065] Figure 5A It is a schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure.

[0066] In some examples, such as Figure 5A As shown, the first optical module 22 includes a first convex lens 221 and a first concave lens 222 which are sequentially arranged along the light emitting direction of the first light beam 24, wherein the focus of the first convex lens 221 coincides with the focus of the first concave lens 222, and at this time, the optical axis of the first convex lens 221 coincides with the optical axis of the first concave lens 222. Specifically, the common focus of the first convex lens 221 and the first concave lens 222 is located on the side of the first concave lens 222 away from the first convex lens 221. In this way, the first light beam 24 which is parallel light is converged to the first concave lens 222 after passing through the first convex lens 221, and then diffused by the first concave lens 222 to emit the second light beam 25 which is also parallel light.

[0067] For example, combined with Figure 4As shown, a plurality of first convex lenses 221 are provided, and the first convex lenses 221 correspond to the infrared light-emitting units 21 one by one. The first light beam 24 emitted by each infrared light-emitting unit 21 is emitted after passing through the corresponding first convex lens 221. For another example, the first convex lens 221 extends along the length direction of the frame strip, and the projection of the first convex lens 221 along the emission direction of the first light beam 24 covers the projections of the plurality of infrared light-emitting units 21 along the emission direction of the first light beam 24. The first light beams 24 emitted by the plurality of infrared light-emitting units 21 are emitted toward the incident surface of the same first convex lens 221, and then emitted from the emission surface of the first convex lens 221. For example, the second concave lens 322 extends along the length direction of the frame strip.

[0068] For example, the first convex lens 221 is a plano-convex lens, with the convex surface facing the infrared light emitting unit 21 and the flat surface facing the first concave lens 222. For example, the first concave lens 222 is a plano-concave lens, with the concave surface facing the receiving component 3 and the flat surface facing the first convex lens 221.

[0069] For example, the first convex lens 221 is arranged symmetrically with respect to its own optical axis, and the first concave lens 222 is arranged symmetrically with respect to the optical axis of the first convex lens 221. At this time, the infrared light emitting unit 21 can be arranged on the optical axis of the first convex lens 221 and the first concave lens 222. In this case, the spacing between the first convex lens 221 and the first concave lens 222 can be changed by adjusting the focal length f1 of the first convex lens 221 and the focal length f2 of the first concave lens 222, thereby adjusting the arrangement of the emitting assembly 2.

[0070] Figure 5B is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure.

[0071] For example, Figure 5B As shown, the first convex lens 221 and the first concave lens 222 are both arranged away from the common optical axis of the first convex lens 221 and the first concave lens 222, and the first concave lens 222 is closer to the common optical axis of the first convex lens 221 and the first concave lens 222 than the first convex lens 221. At this time, along the thickness direction of the infrared touch module 10, the infrared light-emitting unit 21, the first convex lens 221 and the first concave lens 222 can be arranged at different heights to increase the flexibility of the arrangement of the emission component 2. In this case, the optical path of the infrared light can be adjusted by adjusting the curvature of the curved surface of the first convex lens 221 and the first concave lens 222, so that the optical path of the infrared light converges and narrows from the horizontal direction and then diffuses to the horizontal direction for emission.

[0072] In some examples, along the thickness direction of the infrared touch module 10, the length of the first concave lens 222 is less than the length of the first convex lens 221. It should be noted that the length of the first concave lens 222 along the thickness direction of the infrared touch module 10 specifically refers to the thickness of the portion of the first concave lens 222 located on the display side of the display panel 20. Since the first convex lens 221 can converge light, the length of the first concave lens 222 along the thickness direction of the infrared touch module 10 can be set to be less than the length of the first convex lens 221, thereby reducing the length of the first concave lens 222 along the thickness direction of the infrared touch module 10 and reducing the distance b between the infrared light channel and the display panel 20 (e.g., Figure 3A and Figure 5A It should be noted that when there is a gap b between the infrared light channel and the display panel 20, when the finger does not touch the display panel 20 but has blocked the infrared light channel, the infrared touch module 10 has already had a touch effect. The smaller the gap b between the infrared light channel and the display panel 20, the shorter the touch delay of the infrared touch module 10 and the better the touch sensitivity.

[0073] Figure 5C This is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure.

[0074] In other examples, such as Figure 5C As shown, the first optical module 22 includes a first convex lens 221 and a second convex lens 223 sequentially arranged along the light-emitting direction of the first light beam 24, wherein the focus of the first convex lens 221 coincides with the focus of the second convex lens 223, and at this time, the optical axis of the first convex lens 221 coincides with the optical axis of the second convex lens 223. Specifically, the common focus of the first convex lens 221 and the second convex lens 223 is located between the second convex lens 223 and the first convex lens 221, and the focal length f1 of the first convex lens 221 is greater than the focal length f2 of the second convex lens 223, so as to ensure that the width of the second light beam 25 perpendicular to the emission direction is smaller than the width of the first light beam 24 perpendicular to the emission direction. In this way, the first light beam 24, which is parallel light, is converged after passing through the first convex lens 221 and then diffused to the second convex lens 223, and then converged after passing through the second convex lens 223 to emit the second light beam 25 which is also parallel light.

[0075] For example, the first convex lens 221 is a plano-convex lens, with the convex surface facing the infrared light emitting unit 21 and the flat surface facing the second convex lens 223. For example, the second convex lens 223 is a plano-convex lens, with the flat surface facing the first convex lens 221 and the convex surface facing the receiving component 3.

[0076] For example, the first convex lens 221 is arranged symmetrically with respect to its own optical axis, and the second convex lens 223 is arranged symmetrically with respect to the optical axis of the first convex lens 221. At this time, the infrared light emitting unit 21 can be arranged on the optical axis of the first convex lens 221 and the second convex lens 223. In this case, the spacing between the first convex lens 221 and the second convex lens 223 can be changed by adjusting the focal length f1 of the first convex lens 221 and the focal length f2 of the second convex lens 223, thereby adjusting the arrangement of the emitting assembly 2.

[0077] Figure 5D This is another schematic diagram of a transmitting assembly provided by at least one embodiment of the present disclosure.

[0078] For example, Figure 5D As shown, the first convex lens 221 and the second convex lens 223 are both set away from the common optical axis of the first convex lens 221 and the second convex lens 223, and the second convex lens 223 is closer to the common optical axis of the first convex lens 221 and the second convex lens 223 than the first convex lens 221. At this time, along the thickness direction of the infrared touch module 10, the infrared light-emitting unit 21, the first convex lens 221 and the second convex lens 223 can be set at different heights to increase the flexibility of the arrangement of the emission component 2. In this case, the optical path of the infrared light can be adjusted by adjusting the curvature of the curved surface of the first convex lens 221 and the second convex lens 223, so that the optical path of the infrared light converges from the horizontal direction and diffuses and narrows, and then converges to the horizontal direction and is emitted.

[0079] In some examples, along the thickness direction of the infrared touch module 10, the length of the second convex lens 223 is less than the length of the first convex lens 221. It should be particularly noted that the length of the second convex lens 223 along the thickness direction of the infrared touch module 10 specifically refers to the thickness of the portion of the second convex lens 223 located on the display side of the display panel 20. Since the first convex lens 221 can converge light, the length of the second convex lens 223 along the thickness direction of the infrared touch module 10 can be set to be less than the length of the first convex lens 221, thereby reducing the length of the second convex lens 223 along the thickness direction of the infrared touch module 10 and reducing the distance b between the infrared light channel and the display panel 20 (e.g., Figure 5C It should be noted that when there is a gap b between the infrared light channel and the display panel 20, when the finger does not touch the display panel 20 but has blocked the infrared light channel, the infrared touch module 10 has already had a touch effect. The smaller the gap b between the infrared light channel and the display panel 20, the shorter the touch delay of the infrared touch module 10 and the better the touch sensitivity.

[0080] It should be noted that regarding the first optical module 22, although two structures of the first optical module 22 are shown in the examples of the present disclosure, this is not a specific limitation of the first optical module 22. Without departing from the principles of the present disclosure, the first optical module 22 can also be a lens group of other structures, which can ensure that the width of the second light beam 25 emitted from the first optical module 22 at right angles to the emission direction is smaller than the width of the first light beam 24 emitted from the infrared light-emitting unit 21 at right angles to the emission direction.

[0081] Figure 3B This is another cross-sectional view of a display device provided by at least one embodiment of the present disclosure.

[0082] For example, Figure 3A As shown, along the thickness direction perpendicular to the display panel 20, part of the structure of the frame 1 overlaps the display side of the display panel 20. For another example, Figure 3B As shown, along the thickness direction perpendicular to the display panel 20 (i.e., the thickness direction of the infrared touch module 10), the light emitting component of the first optical module 22 (specifically the first concave lens 222 or the second convex lens 223 in the example disclosed in the present invention) is overlapped on the display side of the display panel 20. In this way, the distance b between the infrared light channel and the display panel 20 can be further reduced or even eliminated, thereby improving the user experience of the infrared touch module 10.

[0083] Figure 3C This is another cross-sectional view of the display device provided by at least one embodiment of the present disclosure.

[0084] For example, Figure 3C As shown, the display panel 20 includes a backlight assembly 4 and a display assembly 5, and the backlight assembly 4 is located on the non-display side of the display assembly 5. A tempered film 51 is provided on the display side of the display assembly 5, and the light-emitting component of the first optical module 22 is overlapped on the surface of the tempered film 51 away from the display assembly 5.

[0085] For example, along the thickness direction of the infrared touch module 10, the thickness of the light emitting component of the first optical module 22 is greater than or equal to the flatness of the display panel 20, thereby ensuring that the infrared light emitted from the light emitting component of the first optical module 22 will not be completely blocked by the display panel 20, and can be received by the receiving component 3. In addition, when the thickness of the light emitting component of the first optical module 22 is equal to the flatness of the display panel 20, the touch effect of the infrared touch module 10 is optimal.

[0086] Fig. 6A It is a schematic diagram of a receiving component provided by at least one embodiment of the present disclosure.

[0087] For example, Fig. 6AAs shown, the second optical module 32 is configured to make the width of the third light beam 34 perpendicular to the incident direction greater than the width of the second light beam 25 perpendicular to the incident direction. In this way, the irradiation range of the third light beam 34 is expanded, thereby improving the sensitivity of the receiving unit 31 in receiving infrared light.

[0088] In some examples, the second optical module 32 includes a second concave lens 322 and a third convex lens 321 sequentially arranged along the incident direction of the second light beam 25, wherein the focus of the third convex lens 321 coincides with the focus of the second concave lens 322, and at this time, the optical axis of the third convex lens 321 coincides with the optical axis of the second concave lens 322. Specifically, the common focus of the third convex lens 321 and the second concave lens 322 is located on the side of the second concave lens 322 away from the third convex lens 321. In this way, the second light beam 25, which is parallel light, is diffused to the third convex lens 321 after passing through the second concave lens 322, and then focused by the third convex lens 321 to emit the third light beam 34, which is also parallel light.

[0089] For example, Figure 4 As shown, a plurality of third convex lenses 321 are provided, and the third convex lenses 321 correspond to the receiving units 31 one by one, and the third light beam 34 emitted from each third convex lens 321 is emitted to the corresponding receiving unit 31. For another example, the third convex lens 321 extends along the length direction of the frame bar, and the projection of the third convex lens 321 along the emission direction of the third light beam 34 covers the projections of multiple receiving units 31 along the emission direction of the third light beam 34, and the third light beam 34 emitted from different positions of the emission surface of the third convex lens 321 is emitted to different receiving units 31. For example, the second concave lens 322 extends along the length direction of the frame bar.

[0090] For example, the second concave lens 322 is a plano-concave lens, with the concave surface facing the transmitting assembly 2 and the flat surface facing the third convex lens 321. For example, the third convex lens 321 is a plano-convex lens, with the convex surface facing the receiving unit 31 and the flat surface facing the second concave lens 322.

[0091] For example, the third convex lens 321 is arranged symmetrically with respect to its own optical axis, and the second concave lens 322 is arranged symmetrically with respect to the optical axis of the third convex lens 321. At this time, the receiving unit 31 can be arranged on the optical axis of the third convex lens 321 and the second concave lens 322. In this case, the spacing between the third convex lens 321 and the second concave lens 322 can be changed by adjusting the focal length f3 of the second concave lens 322 and the focal length f4 of the third convex lens 321, so as to adjust the arrangement of the receiving component 3.

[0092] Figure 6B is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure.

[0093] For example, Figure 6BAs shown, the third convex lens 321 and the second concave lens 322 are both arranged away from the common optical axis of the third convex lens 321 and the second concave lens 322, and the second concave lens 322 is closer to the common optical axis of the third convex lens 321 and the second concave lens 322 than the third convex lens 321. At this time, along the thickness direction of the infrared touch module 10, the receiving unit 31, the third convex lens 321 and the second concave lens 322 can be arranged at different heights to increase the flexibility of the arrangement of the receiving component 3. In this case, the optical path of the infrared light can be adjusted by adjusting the curvature of the curved surface of the third convex lens 321 and the second concave lens 322, so that the optical path of the infrared light is diffused and widened from the horizontal direction and then converged to the horizontal direction to be emitted to the receiving unit 31.

[0094] For example, along the thickness direction of the infrared touch module 10 , the length of the second concave lens 322 is equal to the length of the light emitting component of the first optical module 22 (specifically the first concave lens 222 or the second convex lens 223 in the example disclosed in the present invention).

[0095] In some examples, along the thickness direction of the infrared touch module 10, the length of the second concave lens 322 is less than the length of the third convex lens 321. It should be noted that the length of the second concave lens 322 along the thickness direction of the infrared touch module 10 specifically refers to the thickness of the second concave lens 322 located on the display side of the display panel 20.

[0096] Figure 6C This is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure.

[0097] In other examples, such as Figure 6C As shown, the second optical module 32 includes a fourth convex lens 323 and a third convex lens 321 which are sequentially arranged along the incident direction of the second light beam 25, wherein the focus of the third convex lens 321 coincides with the focus of the fourth convex lens 323, and at this time, the optical axis of the third convex lens 321 coincides with the optical axis of the fourth convex lens 323. Specifically, the common focus of the third convex lens 321 and the fourth convex lens 323 is located between the fourth convex lens 323 and the third convex lens 321, and the focal length f4 of the third convex lens 321 is greater than the focal length f3 of the fourth convex lens 323, so as to ensure that the width of the third light beam 34 perpendicular to the incident direction is greater than the width of the second light beam 25 perpendicular to the incident direction. In this way, the second light beam 25 which is parallel light is converged after passing through the fourth convex lens 323 and then diffused to the fourth convex lens 323, and then diffused through the fourth convex lens 323 to emit the second light beam 25 which is also parallel light.

[0098] For example, the third convex lens 321 is a plano-convex lens, with the convex surface facing the receiving unit 31 and the flat surface facing the fourth convex lens 323. For example, the fourth convex lens 323 is a plano-convex lens, with the flat surface facing the third convex lens 321 and the convex surface facing the transmitting assembly 2.

[0099] For example, the third convex lens 321 is arranged symmetrically with respect to its own optical axis, and the fourth convex lens 323 is arranged symmetrically with respect to the optical axis of the third convex lens 321. At this time, the receiving unit 31 can be arranged on the optical axis of the third convex lens 321 and the fourth convex lens 323. In this case, the spacing between the third convex lens 321 and the fourth convex lens 323 can be changed by adjusting the focal length f4 of the third convex lens 321 and the focal length f3 of the fourth convex lens 323, thereby adjusting the arrangement of the receiving component 3.

[0100] Fig.6D This is another schematic diagram of a receiving component provided by at least one embodiment of the present disclosure.

[0101] For example, Fig.6D As shown, the third convex lens 321 and the fourth convex lens 323 are both arranged away from the common optical axis of the third convex lens 321 and the fourth convex lens 323, and the fourth convex lens 323 is closer to the common optical axis of the third convex lens 321 and the fourth convex lens 323 than the third convex lens 321. At this time, along the thickness direction of the infrared touch module 10, the receiving unit 31, the third convex lens 321 and the fourth convex lens 323 can be arranged at different heights to increase the flexibility of the arrangement of the receiving component 3. In this case, the optical path of the infrared light can be adjusted by adjusting the curvature of the curved surface of the third convex lens 321 and the fourth convex lens 323, so that the optical path of the infrared light converges from the horizontal direction first, then diffuses and widens, and then converges to the horizontal direction and is emitted to the receiving unit 31.

[0102] For example, along the thickness direction of the infrared touch module 10 , the length of the fourth convex lens 323 is equal to the length of the light emitting component of the first optical module 22 (specifically the first concave lens 222 or the second convex lens 223 in the example disclosed in the present invention).

[0103] In some examples, along the thickness direction of the infrared touch module 10, the length of the fourth convex lens 323 is less than the length of the third convex lens 321. It should be noted that the length of the fourth convex lens 323 along the thickness direction of the infrared touch module 10 specifically refers to the thickness of the portion of the fourth convex lens 323 located on the display side of the display panel 20.

[0104] Regarding the second optical module 32, it should be noted that although two structures of the second optical module 32 are shown in the examples of the present disclosure, this is not a specific limitation on the second optical module 32. Without departing from the principles of the present disclosure, the second optical module 32 can also be a lens group of other structures, which can ensure that the width of the second light beam 25 emitted from the first optical module 22 in the direction perpendicular to the emission direction is smaller than the width of the first light beam 24 emitted from the infrared light emitting unit 21 in the direction perpendicular to the emission direction. In addition, the second optical module 32 can also use an ordinary infrared transparent film to ensure that the second light beam 25 can pass through the second optical module 32 and emit to the receiving unit 31.

[0105] In summary, the principles of the infrared touch module 10 provided by the present disclosure are:

[0106] The first light beam 24 emitted by the infrared light emitting unit 21 emits a second light beam 25 through the first optical module 22, and the second light beam 25 is emitted toward the receiving component 3. The width of the second light beam 25 perpendicular to the emission direction is smaller than the width of the first light beam 24 perpendicular to the emission direction, thereby reducing the size of the infrared light channel emitted from the first optical module 22 (i.e., the width of the second light beam 25 perpendicular to the emission direction). In addition, since the second light beam 25 is formed by the convergence of the first light beam 24, the intensity of the second light beam 25 is roughly equivalent to the intensity of the first light beam 24. Therefore, the size a of the infrared light channel can be reduced without reducing the intensity of the second light beam 25 (i.e., on the premise of ensuring the touch accuracy), thereby improving the touch sensitivity of the infrared touch module 10.

[0107] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An infrared touch module, characterized in that: include: Frames, including opposing frame strips; A transmitting component is provided in one of the oppositely disposed frame bars, and a receiving component is provided in the other of the oppositely disposed frame bars, wherein the infrared light emitted by the transmitting component is received by the receiving component. In which, the emitting component includes an infrared light-emitting unit and a first optical module, wherein the first light beam emitted by the infrared light-emitting unit emits a second light beam through the first optical module, and the first optical module is configured so that the width of the second light beam perpendicular to the emitting direction is smaller than the width of the first light beam perpendicular to the emitting direction.

2. The infrared touch module according to claim 1, characterized in that: The first optical module includes a first convex lens and a first concave lens sequentially arranged along the light-emitting direction of the first light beam, wherein the focus of the first convex lens coincides with the focus of the first concave lens.

3. The infrared touch module according to claim 2, characterized in that: The first convex lens is arranged axially symmetrically with respect to the optical axis of the first convex lens; The first concave lens is arranged axially symmetrically with respect to the optical axis of the first convex lens.

4. The infrared touch module according to claim 2, characterized in that: The first convex lens and the first concave lens are both arranged away from the optical axis of the first convex lens, and the first concave lens is closer to the optical axis of the first convex lens than the first convex lens.

5. The infrared touch module according to claim 1, characterized in that: The first optical module includes a first convex lens and a second convex lens sequentially arranged along the light-emitting direction of the first light beam, wherein the focus of the first convex lens coincides with the focus of the second convex lens.

6. The infrared touch module according to claim 5, characterized in that: The first convex lens is arranged axially symmetrically with respect to the optical axis of the first convex lens; The second convex lens is arranged axially symmetrically with respect to the optical axis of the first convex lens.

7. The infrared touch module according to claim 5, characterized in that: The first convex lens and the second convex lens are both arranged away from the optical axis of the first convex lens, and the second convex lens is closer to the optical axis of the first convex lens than the first convex lens.

8. The infrared touch module according to any one of claims 2 to 4, characterized in that: Along the thickness direction of the infrared touch module, the length of the first concave lens is smaller than the length of the first convex lens.

9. The infrared touch module according to any one of claims 5 to 7, characterized in that: Along the thickness direction of the infrared touch module, the length of the second convex lens is smaller than the length of the first convex lens.

10. The infrared touch module according to claim 1, characterized in that: The transmitting assembly further includes a first circuit board, which is fixed in the frame bar, and the infrared light-emitting unit and the first optical module are both fixed to the first circuit board.

11. The infrared touch module according to claim 2 or 5, characterized in that: A plurality of first convex lenses are provided, and each of the first convex lenses corresponds to each of the infrared light emitting units; or The first convex lens extends along the length direction of the frame bar, and a projection of the first convex lens along the emitting direction of the first light beam covers a projection of the plurality of infrared light emitting units along the emitting direction of the first light beam.

12. The infrared touch module according to claim 1, characterized in that: The receiving assembly includes a receiving unit and a second optical module. The second light beam emits a third light beam through the second optical module, and the receiving unit receives the third light beam.

13. The infrared touch module according to claim 12, characterized in that: The second optical module is configured such that a width of the third light beam perpendicular to an incident direction is greater than a width of the second light beam perpendicular to the incident direction.

14. The infrared touch module according to claim 13, characterized in that: The second optical module includes a second concave lens and a third convex lens sequentially arranged along the incident direction of the second light beam, wherein the focus of the second concave lens coincides with the focus of the third convex lens.

15. The infrared touch module according to claim 14, characterized in that: The second concave lens is arranged symmetrically with respect to the optical axis of the third convex lens; The third convex lens is arranged axially symmetrically with respect to the optical axis of the third convex lens.

16. The infrared touch module according to claim 15, characterized in that: The second concave lens and the third convex lens are both arranged away from the optical axis of the third convex lens, and the second concave lens is closer to the optical axis of the third convex lens than the third convex lens.

17. The infrared touch module according to claim 13, characterized in that: The second optical module includes a fourth convex lens and a third convex lens sequentially arranged along the incident direction of the second light beam, wherein the focal points of the third convex lens and the fourth convex lens coincide with each other.

18. The infrared touch module according to claim 17, characterized in that: The third convex lens is arranged axially symmetrically with respect to the optical axis of the third convex lens; The fourth convex lens is symmetrically arranged with respect to the optical axis of the third convex lens.

19. The infrared touch module according to claim 17, wherein: The third convex lens and the fourth convex lens are both arranged away from the optical axis of the third convex lens, and the fourth convex lens is closer to the optical axis of the third convex lens than the third convex lens.

20. A display device, characterized in that: include: The infrared touch module according to any one of claims 1 to 19, wherein the relatively arranged frame bars include relatively arranged first and second frame bars and relatively arranged third and fourth frame bars, and wherein the first frame bar and the second frame bar are respectively provided with a pair of the transmitting component and the receiving component, and the third frame bar and the fourth frame bar are respectively provided with another pair of the transmitting component and the receiving component; The display panel is surrounded by the first and second frame bars that are opposite to each other and the third and fourth frame bars that are opposite to each other.

21. The display device according to claim 20, wherein Along a direction perpendicular to the display panel, the light emitting component of the first optical module overlaps the display side of the display panel.

22. The display device according to claim 21, wherein Along a direction perpendicular to the display panel, the thickness of the light-emitting component of the first optical module is greater than or equal to the flatness of the display side of the display panel.

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